Cheap flights from Dublin to Chicago from £247

The cheapest month to fly to Chicago from Dublin is in September. Flight prices, which tend to average around £354, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Chicago from Dublin during November instead. Flights to Chicago in November, while not as cheap as those in September, still average around £357.

The cheapest day to depart on your flight to Chicago is on a Tuesday when prices can be found for as low as £539. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Chicago is Saturday, with ticket prices averaging around £629.

Flying to Chicago from Dublin in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as £506 when looking at flights departing in the afternoon. Flights at midday are often more expensive, with an average ticket price of £614.

Fly from Dublin to Chicago O'Hare Intl for the best Dublin - Chicago flight prices

You are more likely to see cheaper flights to Chicago from Dublin when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around £482 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Dublin for as low as £365 on momondo.

There are 3 cabin classes available to choose from on Dublin to Chicago flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 23% on your flight if you consider stops on a Dublin to Chicago flight.

As of March 2026, prices for Dublin to Chicago flights are approximately 33% more expensive when compared to flights at the same time last year.

Icelandair, JetBlue, and Delta are the most popular carriers operating from Dublin to Chicago

Aer Lingus, United Airlines and Icelandair are the top three most popular airlines that fly to Chicago from Dublin according to our data. Aer Lingus is the first choice among our users, with 72% of people opting to fly with this airline when travelling to Chicago. Keep in mind that there are 3 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

Historically, on average around 13% of flights between Dublin and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 136 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the morning have, in the past, seen delays more frequently in comparison.

Monday is statistically the day of the week that experiences the fewest delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 8% of their flights experiencing any sort of delay.

Reykjavik (KEF) was the most common stop: 78% of momondo users choosing one-stop flights on this route connected there.

Flights via London (LHR) offer the lowest average return price of £1,132.

Flights connecting via London (LHR) have the shortest average one-way travel time: 11h 45m.

London (LHR) has the shortest average stopover time for this route: 1h 38m.

As of March 2026, 12 flights take off from Dublin and land in Chicago each day. The most common flight departure time for this route is 10:00, with 79% of daily flights taking off at midday.

As of March 2026, 89 flights take off from Dublin and land in Chicago each week. The most common flight departure day for this route is Wed, with 15% of weekly flights taking off on this day.